There are two overfill prevention devices available, all designed to give reliable and safe operation.
Model 2794 – Pneumatic overflow alarm
The sensing tube is installed on the drop pipe of the top loader, the depth to be specified by the client. When the sensing tube is submerged, the back-pressure opens or closes an electric contact.
Pressure: 3/5 Bar
Air Consumption: 1.5 nl./min.
Model 3013 – Pneumatic overflow shut-off
This system is similar to the 2794 Model. In this case, the loading valve, pneumatically operated by a spring return actuator, closes when the sensing tube is submerged. A microswitch can also be used for this operation.
A typical example of Model 2794 is shown.
Please also see below product specification for more information